/*
 * Tencent is pleased to support the open source community by making Angel available.
 *
 * Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
 *
 * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * https://opensource.org/licenses/BSD-3-Clause
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.tencent.angel.ml.matrix.codec;

import io.netty.buffer.ByteBuf;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class DefaultDenseDoubleCodec implements DenseDoubleCodec{
  protected final static Log LOG = LogFactory.getLog(DefaultDenseDoubleCodec.class);
  @Override
  public void encode(ByteBuf outBuf, double[] values, int startPos, int length) {
    outBuf.writeInt(length);
    LOG.debug("double size = " + length);
    int end = startPos + length;
    for (int i = startPos; i < end; i++) {
      outBuf.writeDouble(values[i]);
    }
  }

  @Override
  public void decode(ByteBuf inBuf, double[] data, int startPos, int len) {
    int length = inBuf.readInt();
    for(int i = 0; i < length; i++){
      data[i+startPos] = inBuf.readDouble();
    }
  }

  @Override
  public void serialize(ByteBuf buf) {

  }

  @Override
  public void deserialize(ByteBuf buf) {
    
  }

  @Override
  public int bufferLen() {
    return 0;
  }

}
